Wrench.



PATENTED APR; 18,1905.

L. G. EGGBR.

WRENCH.

\APPLIOATION FILED APR. 20, 1904.

sliding nut employed.

Patented April 18, 1905.

PATENT OFFICE.

LEROY G. EGGER, OF BUFFALO, IOWA.

WRENCH.

SPECIFICATION forming part of Letters Patentlfi 0. 787.741, dated April 18, 1905.

I Application filed April 20, 1904. Serial No. 204,033-

To all whom it may concern:

Be it known that I, LEROY G. EGGER, a citizen of the United States, and a resident of Buffalo, in the county of Scott and State of Iowa, have invented a new and Improved l'Vrench, of which the followingis a full, clear,

and exact description.

This invention relates to improvements in wrenches of the type having a sliding jaw, an object being to provide a wrench of this character that will be simple in construction and so constructed that the movable jaw may be quickly adjusted.

Reference is to he had to the accompanying drawings, forming a part of this specification, in which similar characters of reference inclicate corresponding parts in all the-figures.

Figure 1 is a perspective view of a Wrench embodying my invention. Fig. 2 is a side view thereof. Fig. 3 is a fragmentary view showing the position of parts while adjusting the jaw. Fig. 4 shows, respectively. a longitudifial section and a transverse section of the Fig. 5 is a side view of the movable jaw, showing a slight modification; and Fig. 6 is a section on the line 00 m of Fig. 5.

Referring to the drawings, 1 designates the shank of the wrench extended from the handle 9. and having on its opposite end a fixed jaw 3. Mounted to slide on the shank l is an adjustable jaw 4, having a longitudinal bore for receiving a threaded stem 5, extended from a metal block 6, attached to the handle. The jaw 4 isprovided with a transverse opening 7, and arranged in this opening to engage with the stem 5 is a longitudinally-split nut 8, the interior portions thereof having the threads extended about half-way of the length of the nut, and the adjacent inner walls rearward of the threaded portion are divergent, as clearly indicated in.Fig. 4, so that the thread of the nut may be readily disengaged from the thread of the stem by forcing the rear ends of the nut-sections toward each other. ends of the nut-sections are tapered, as indicated at 9, to engage with correspondingly: tapered walls of a recess 10, formed in the front wall of the opening 7. The sections of the nut are held together and permitted to The swing one relatively to the other by means of rings 11, which engage around trunnions 12, formed ,on opposite sides of the nut-sections. These trunnions are constructed by forming annular kerfs in the sections and the rings at one side will preferably be rigidly secured to one, section and have loose connection with the trunnion of the other section, while as to the ring at the opposite side the rigid connection and loose connection will be the reverse of that of the first-named side. This will prevent the rings from becoming detached, but will allow the swinging movements of the nutsections. 'The nut-sections are held in-engagement with the stem by means of V-shaped springs 13, which engage between the sections at the divergent portions and at the opposite sides. The nut is held yieldingly against the walls of the recess 10 by means of springs 14, secured to the rear wall of the opening 7 and bearing against the rear end of the nut-sections. The ends of the springs may be forked to engage partially around the stem 5.

In Figs. 5 and 6 the movable jaw 4 is shown as cut away at its opposite sides, as indicated at 15, and these cut-away portions are inter' mediate of the ends of the jaw, the end portions being somewhat broader than the largest diameter of the nut, thus permitting the wrench to lie flat on a bench 'or the like and without engaging the screw with the bench, and the narrow or cut-away portions permit of readily grasping the nut to manipulate it.

In the operation when it is desired to adjust the jaw 4 the rear ends of the nut-sections are to be pressed together and the jaw moved against the nut to be manipulated, after which the nut 8 will be passed into the recess 10, of course when in a closed position, and then turned to tighten the jaw 4 against the nut to be manipulated. The springs 14 in connection with the springs 13 hold the nut-sections from accidental separation and also hold the nut in the recess 10.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A wrench comprising a shank having a handle at one end and a fixed jaw at the other end, a movable jaw mounted to slide on the shank, and having a longitudinal bore and a transverse opening intersecting said bore, the front wall of said transverse opening being provided with a tapered recess around said bore, said movable jaw being cut away on its sides between its ends to render the central portion thereof comparatively thin, a threaded stem extending from the handle into the bore of the movable jaw, a nut formed of two longitudinal sections pivoted together and mounted on the stem within said transverse opening, said nut being provided with a tapered front end to enter said tapered recess, the inner walls of said nut in advance of its pivot-point being provided with threads, and the rear inner walls of the nut being flared outwardly, springs having one end secured to the rear wall of the opening in the movable jaw with their free ends pressing the rear end of the nut, and V-shaped springs interposed between the flared ends of the nut and acting directly upon said ends to force them from each other whereby to cause the threaded end of the nut to clamp the threaded stem, said central thin portion of the movable jaw being of less thickness than the-diameter of the nut to permit the nut to be easily grasped by the fingers of the operator, and the end portions of the movable jaw being thicker than the diameter of said nut to permit the wrench to be laid upon a bench without engaging the nut.

2. A wrench consisting of a shank having a handle at oneend and a fixed jaw at the other end, a movable jaw mounted to slide on the shank and having a longitudinal bore and a transverse opening, the front wall of which is provided with a tapered recess around said bore, a threaded stem secured to the handle and extending into the bore of the movable jaw, a nut formed of sections pivoted together and mounted on the stem in the transverse opening of the movable jaw, said nut having a tapered front end to enter said tapered recess and provided with internal threads at its forward end, the inner walls of the nut in rear of the threaded portion being flared outwardly, springs having one end secured to the rear wall of the opening in the movable jaw with their free ends forked to partially receive the threaded stem and pressing the rear end of the nut, and V-shaped springs interposed between the flared ends of the nut and acting directly upon said ends to force them from each other, whereby to cause the threaded end of the nut to positively clamp the threaded stem. as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

LEROY Gr. EGGER.

Witnesses:

W. L. MILLER, M. O. MILLER. 

